Brake mechanism



May 6 1924. 1,492,662

A. E. AUGUSTINE BRAKE MEGHANISM Filed April 18 P322 2 SheeS-Shet 2 Patented May 6, i924.

ATENT FFC.

ADDISON E. AUGUSTINE, OF HAGKENSACK, i NEW JERSEY, ASSIGNOR TO CHESTER MAGHINE CO. INC., OF NEW YORK, N. Y., A CORPORATION F NEW YORK.

BRAKE MEcHANrsM. i

.pplication filed April 18, 1922. Serial No. 554,901.

To all whom t may concern:

Be it known that I, ADDISON E. AUGUS- TINE, a citizen of the United States, residing at Hackensack, in the county of Bergen and State of New Jersey, have invented certain new and useful Improvements in Brake Mechanism, of which the following is a specification. 7

rIhis invention relates to a brake device for envelop-making, and like, machines.

An object of the invention is to provide a brake mechanism which is of simple, practical and efficient construction and which comprises a single handle part operable at will to connect, or disconnect, the power drive and to brake movements of the machine..

A more detailed object is to provide a loose drive pulley upon the main shaft of the machine, to provide an improved form of clutch device operable to connect said pulley for driving the shaft, to provide a disc iXed to the shaft, to lprovide a novel form of clutch device 'comprising parts of the t first .clutch device and operable to engage said disc for braking rotation of the shaft, and to provide a single operating handle for controlling said two clutches.

Other objects and aims ofthe invention, more or less specific than those referred to above, will be in part obvious and in part pointed out in the course of the following ldescription of the elements, combinations, arrangements of parts and application of principles, constituting the invention, and the scope of protection `contemplated will be indicated in the appended claims.

In the accompanying drawings which are te be taken as a part of this specification; and in which I have shown merely a preferred form of embodiment of the invention:-

Figure 1 is a horizontal sectional view thru a device constructed in accordance with this invention, being partly in top plan and showing the same associated with the main drive shaft of an envelop-making, or like, machine. c

Figure 2 is a vertical sectional view taken substantially upon the plane of line II of Fig. 1.

Figure 3 is a vertical transverse sectional view taken substantially upon the plane of line III of Fig. 1, and looking in the directioi of the arrow associated with said line, an v Figure 4; is a vertical transverse sectional View taken substantially upon the plane of line IV of Fig. 1,. and looking in the direction of the arrow associated with said line.

Referring to the drawings for describing in detail the structure which isr therein illustrated, the reference character L indicates the main, or drive shaft of any suitable machine, as for instance, an envelop-making machine, said shaft being mountedto rotate in a suitable bearing 1 formed in the frame 2 of the machine. Upon this shaft is mounted a loose drive pulley G. A collar 3 is fixed to the shaft within this pulley having oppositely extending radial arms l and 5 at the outer ends of which are provided clutch extension parts 6 and 7 respectively, said clutch extensions having their outer surfaces so curved as to fit within the space defined by a clutch band 8 formed integrally with pulley G. These extensions, by reason of their formation, are flexible and are adapted to be spread outwardly for frictionally engaging against the band 8 whenever it is desired to drive the shaft by the pulley. c v

As a simple expedient for spreading the extensions the drawings illustrate a pair of levers, as 9 and 10. The lever 9 is rotatably mounted upon the arm 4, as at 11, and'has a nose part 12 arranged to engage against the end surface 13 of the 'extension 7, while the lever is rotatably mounted upon arm 5, as at lll, and has a nose part 15 disposed to engage against the end surface 16 of extension 6. The levers project from their pivotal mountings 11 and 1l to opposite sides of the shaft L and there carry adjustable wearing heads 17 and 18 respectively disposed to be engaged and operated by the cone-shaped surface portion 19 of a collar 2O which is slidably and rotatably `mounted upon the shaft.

Whenever the collar 2O is sli-d along the shaft to position between the wear heads the levers 9 and 10 will be thereby swung for pressing the extensions 6 and 7 into tight frictional engagement with the band 8.

When the collar 20 is free of the wear heads'then the extensions 6 and 7 will return to their natural, or normal, positions just free of the inner surface of the band 8 so as to leave the pulley G free to rotate without imparting rotation to the shaft.

It is to be particularly noted in this connection that the levers`9 and 10 swing in a plane transversally of the length of the shaft, and that this arrangement produces a very compact structure. Also, that said levers and the parts associated therewith are constructed and operate in such manner that there is no tendency at any time to move the pulley G along the shaft L.

A simple disc member 21 is fixed at the end of the shaft to provide a shoulder adapted to cooperate with the opposing shoulder provided by the collar 3 for confining the pulley in operative position upon the shaft.

The wear heads 17 and 18 are preferably formed separate from the levers 9 and 10 and have threaded shanks 22 received in threaded apertures of the arms and held in any adjusted position by set nuts 23. They may thus be adj usted to any desired position relative to the collar 2O for producing a desired degree of tightness of the clutch by a given movement of the collar.

The collar 2O is formed with a suitable groove 24 therein within which engage the operating lug parts 25 which are carried one by each of the yoke arms 26 and 27 of an operating lever 28. This lever is mounted to swing in a horizontal plane upon a pivot 29 and is thereby adapted for moving the collar back and fort-h along the shaft, as may be desired by the operator.

Surrounding the shaft L at the opposite side of the collar 2O is a disc H, said disc being fixed rigidly to the shaft, as by means of a set screw, or the like, 30. This disc has an annular flange 31, the inner surface of which constitutes a clutch surface to be engaged by a pair of clutch members 32 and 83.

These clutch members are formed and are independently mounted upon a stationary bracket 34 arranged at one side of the shaft. The clutch member 32 is pivotally connected with the bracket as by means of a pivot member 35, and extends therefrom across the upper side of the shaft, while the clutch member 33 is connected to the bracket 34 by means of a pivot member 36 and extends across the under side of the shaft. Y

These clutch members each have an arcuate portion preferably carrying a friction facing 37 disposed to fit to the contour of the clutch surface portion of liange 31. Each of these clutch members is yalso providedk with a socket 38.

A pair of struts 39 and 40 is provided disposed to extend between the sockets 38 and opposing sockets 41 formed to receive them in the yoke arms 26 and 27. These struts may be identical and may take any appropriate form but preferably they conseparately 1,49a,eea

sist each of a pair of heads 42 and 43 having semi-spherical outer end surfaces for engaging within the sockets 38 and 41 and being connected by a body part 44 which 1s rigid with one head and which has threaded connection with the other head. A set nut, as 45, may be carried by the body for engaging the second head to hold the parts against movement out of their adjusted positions.

A suitable tension spring 46 is connected between the arms 32 and 33 constantly urging them out of clutching position, said spring thereby also operating to i'naintam the struts in proper operative engagement with their several sockets.

It is intended that the several parts of this structure shall be so proportioned that when the handle 28 has been swung for releasing the clutch parts 6 and 7 from the pulley G, neither of the clutches will stand in clutching position, but that a further movement of the handle will so slide the collar 2O as to bring the struts 39 and 40 to such a straightened, or aligned, condition as to spread the arms 32 and 33 into clutching engagement with the disc 26, thereby applying a restraining force to rotation of the disc and shaft.

By this arrangement it will be apparent that when the handle is in one extreme position, then the pulley G will drive the shaft unhindered, that when the handle is in an intermediate position the pulley will have no driving connection with the shaft, and that when the handle is in its opposite extreme rotation of the shaft will be forcefully obstructed. It follows, therefore, that by a single swinging movement of the handle an operator may almost simultaneously disconnect the. power drive from his machine and apply a brake for stopping any momentum movement of the machine.

It will be apparent further that by adjustment of the wear heads 17 and 18 of the drive clutch, and adjustment of the length of the struts 39 and 40 of the brake clutch, the device may be made to operate in such manner that the braking effect of the brake clutch may begin to be felt exactly at, or even before, the time when the drive clutch is wholly released.

As many changes could be made in this construction without departing from the scope of the invention as defined in the following claims, it is intended that all matter contained in the above description, or shown in the accompanying drawings, shall be interpreted as illustrative only and not in a limiting sense.

It is important to note that by the construction described the lever, or handle A28, may be made to stand in either of its extreme positions so that either the drive clutch, or the brake clutch, may be mainllO tained in clutching position indefinitely Without attention, and that this result is secured without the presence of a segmental rack or other accessory to the lever. When the lever is swung to its right hand extreme, Fig. 1, the collar 20 will move sufficiently far to the left along the shaft L so that the cylindrical portion of said collar will stand beneath and in engagement with the wearlieads 17 and 18 and no tendency will be present to move the collar out of this position. IVhen the lever is swung to its left hand eXtreme, Fig. 1, the collar will move sufliciently far to the right along the shaft so that the struts 39 and 40 will pass center;

that is, they will move to and slightly beyond a straightened, or aligned, condition, with the collar resting against the hub portion of the disc II. No tendency will exist for movement of the collar out of this position.

The yoke arms 26 and 27 are slightly re silient with respect to each other so that they will readily facilitate a passed-center movement of the struts, and will yet maintain the resilient pressureagainst the struts urging them outwardly to clutching position.

I-Iaving thus described my invention, what I claim as new and desire to secure by Let- 1. In a device of the class described, a main shaft, a drive pulley loosely inounte thereon, a clutch for fixing the pulley to drive the shaft, a collar slidable upon the shaft, said collar being conical at one end, the clutch comprising parts arranged to be engaged by the conical portion of said collar when the collar` is moved in one direction along the shaft for thus applyingthe clutch, operating means for the collar, and a brake for the shaft, said brake comprising a disc rotatable with the shaft, friction means mounted independently of the shaft adapted to be pressed against said disc for braking rotation of the disc, and means to press said friction means against the disc when said collar is moved in the opposite direction.

2. In a device of the class described, a main shaft, a drive pulley loosely mounted thereon, a clutch for fixing the pulley to drive the shaft, a collar slidable upon the shaft, said collarbeing conical at one end, the clutch comprising parts arranged to be engaged by the conical portion of said collar `when the collar is moved in one direction along the shaft for thus applying the clutch, a pivotally mounted operating handle for moving the collar, a brake' for the shaft, said brake comprising a disc fixed to rotate with the shaft, friction means mounted independently of the shaft adapted to be pressed against said disc for braking rotation of the disc, and means interengaging between said handle and said friction means to press said friction means against the disc when thehaneea 5 dle is operated to move the collar in the opposite direction.

8. In a device of the class described, a main shaft, a drive pulley loosely mounted thereon, a clutch for fixing the pulley to drive the shaft, a collar slidable upon the shaft, said colla-r being conical at one end. the clutch comprising parts arranged to be engaged by the co-nical portion of said collar when the collar is moved in one direction along the shaft for thus applying the clutch, a pivotally mounted operating handle for moving the colla-r, said operating handle having yoke arms extending one to each side of said collar, and a brake for the. shaft, said brake comprising a member fixed to rotate wit'h the shaft, said member providing an inwardly facing annular clutch surface concentric with the shaft, a pair of brake Iarms pivotally mounted independently of the shaft, one of said arms extending from its pivotal mounting and across one side of the shaft, the other arm extending from its pivotal mount-ing across the opposite side of the shaft, said arms having friction surface portions disposed to engage said inwardly facing annular clutch surface for braking rotation of the shaft, and struts extending from said yoke arms radially into engagement with said brake arms respec tively to thereby force said brake arms into d braking position when the handle is ope-n ated to move the collar in the opposite direction.

4. In a device of the class described, a main shaft, a. drive pulley loosely mounted thereon, a clutch for fixing the pulley to drive the shaft, a collar slidable upon the shaft, said collar being conical at one end, the clutch comprising parts arranged to be engaged by the conical portion of said collar when the collar is moved in one direction along the shaft for thus applying the clutch, a pivotally mounted operating handle for moving the collar, said operating handle having yoke arms extending one to each side of said collar, a brake for the shaft, said brake comprising a member fixed to rotate with the shaft, said member providing an inwardly facing annular clutch surface concentric with the shaft, a bracket arranged at one side of said shaft, a pair of brake arms pivotally mounted upon spaced pivots carried by said bracket, said brake arms extending from their pivots in substantially parallel relation at opposite sides of the shaft, each of said arms having a friction surface portion disposed to engage said inwardly facing yannular clutch surface for braking rotation of the shaft, a spring eX- tending between said brake arms for drawing them toward each other to thereby normally hold them out of braking position, and struts extending from said yoke arms radially into engagement with said brake llO arms respectively to thereby force said brake arms lapart and into braking position When the handle is operated to move the collar in the opposite direction.

5. In a device of the class described, a main shaft, a drive pulley loosely mounted thereon comprising a clutch band, a clutch for fixing the pulley to drive the shaft, said clutch comprising a collar fixed to rotate with the shaft, a pair of arms formed upon said collar projecting in opposite directions radially therefrom, a pair of clutch eXtensions continuing from the outer ends of said arms respectively, said extensions being resilient and being shaped to fit to the contour 0f the inner surface of said band, levers carried one by each of said arms, each having a nose part arranged t0 engage the clutch extension of the other arm for springing said extensions into clutch engagement with said band, an operating handle by which to operate said levers, and a brake arranged to be operated b y said handle when the handle is operated to release the levers.

6. In a 4device of the class described, a shaft, a drive pulley loosely mounted upon said shaft, a clutch for fixing said pulley to drive the shaft, an operating handle by which to .operate said clutch and a brake arranged to be operated by said handle when the handle is moved to release the clutch, said brake comprising a disc fixed to the shaft, and friction means mounted independently of the shaft adapted t0 be pressed by said handle against said disc.

In a device of the class described, a shaft, la drive pulley mounted upon said shaft, a clutch operable to engage said pulley, clutch operating means movable toward and away from said clutch for applying and releasing said clutch, a part arranged' to be driven by said pulley when said clutch is` applied, and friction means mounted independently of the shaft adapted to be pressed against said mentioned part for braking movement thereof when the clutch operating means is moved to clutch releasing position.

In testimony whereof I aHiX my signature in the presence yof two witnesses.

ADDISON E. AUGUSTINE.

. Witnesses:

L. Gnssron HANDY,

MAY SCHULZ. 

